Dc Distribution - Huawei Airbridge BTS3612A-1900 Technical Manual

Technical Manual
Airbridge BTS3612A CDMA Base Station
L
220VAC
N
Figure 5-3 Distribution of single-phase 220V AC
III. Distribution of three-phase 110V AC
If the single-phase 110V AC is used for the BTS3612A, an air conditioner (or heat
exchanger) and a PCU
configuration is the same with the distribution of three-phase 220V AC.
IV. Distribution of single-phase 110V AC
If the single-phase 110V AC is used for the BTS3612A, a wiring terminal for phase
conversion should be equipped before the air switch to convert the single-phase power
into three-phase power. The rest configuration is the same with the distribution of
three-phase 110V AC.

5.2.2 DC Distribution

I. Distribution of –48V DC
Figure 5-4 illustrates how the 220V AC is converted into –48V DC and then distributed.
The 220V AC is output by the AC distribution unit to the 220V AC power input busbar
on the backplane of the PSU
multiple –48V DC supplies to the busbar.
Chapter 5 Power & Environment Monitoring Subsystem
AC distribution unit
32A
A
N
10A
63A
B
N
63A
C
Lightning
arrester
N
that support 110V AC should be configured. The rest
AC/DC
subrack. The PSU
AC/DC
5-3
Voltage
A,N
regulator
B,N
C,N
converts the power and outputs
AC/DC
System Principle
Air conditioner/heat
exchanger
Reserved
+24V DC
PSU
AC/DC
+24V DC
PSU
AC/DC